C) Myelopathy

This answer is correct.

"Myelopathy" refers to a disease process within the spinal cord. The spinal cord and brain are parts of the central nervous system, and are not considered part of the peripheral nervous system. (See References)

E) Neuromuscular Junction Disorder

This answer is incorrect.

"Neuromuscular Junction Disorder" refers to a disease process of the neuromuscular junctions. A neuromuscular junction is the specialized synapse between a single neuron and a single muscle fiber. The neuromuscular junction is considered part of the peripheral nervous system. (See References)